Padraig, King of Echoes

If an Instant or Sorcery card would be put in
your graveyard instead exile it with an Echo
counter on it.
{t}: Choose an exiled card with an Echo
counter on it. You may play it this turn
without paying its mana cost. When you do
create a colourless X/X creature token named
'Echoes', where X is the mana cost of
the spell you cast.